[root@localhost SPECFEM3D]# ./configure FC=ifort MPIFC=mpif90
checking whether the Fortran compiler works... yes
checking for Fortran compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU Fortran compiler... no
checking whether ifort accepts -g... yes
configure: running /bin/sh flags.guess
checking how to get verbose linking output from ifort... -v
checking for Fortran libraries of ifort...  -L/opt/intel/composerxe-2011.2.137/compiler/lib/ia32 -L/opt/intel/composerxe-2011.2.137/mkl/lib/ia32 -L/opt/intel/composerxe-2011.2.137/compiler/lib/ia32/ -L/opt/intel/composerxe-2011.2.137/mkl/lib/ia32/ -L/usr/lib/gcc/i386-redhat-linux/4.1.1/ -L/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../ -L/lib/ -L/usr/lib -lifport -lifcore -limf -lsvml -lm -lipgo -lirc -lirc_s -ldl
checking for gcc... gcc
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for dummy main to link with Fortran libraries... none
checking for Fortran name-mangling scheme... lower case, underscore, no extra underscore
checking for Fortran flag to compile .f90 files... none
checking for Fortran flag needed to accept free-form source... none
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ISO C89... (cached) none needed
checking for scotchfarchinit  in -lscotch... no
checking whether Scotch is usable... no, using bundled scotch instead
checking for flex... flex
checking lex output file root... lex.yy
checking lex library... none needed
checking whether yytext is a pointer... no
checking for bison... bison -y
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking for the pthreads library -lpthreads... no
checking whether pthreads work without any flags... no
checking whether pthreads work with -Kthread... no
checking whether pthreads work with -kthread... no
checking for the pthreads library -llthread... no
checking whether pthreads work with -pthread... yes
checking for joinable pthread attribute... PTHREAD_CREATE_JOINABLE
checking if more special flags are required for pthreads... no
pthread found
checking whether mpif.h works... no
configure: error: in `/root/Desktop/SPECFEM3D':
configure: error: cannot compile a trivial MPI program using mpif90
See `config.log' for more details
[root@localhost SPECFEM3D]#